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Finding the Fourth Proportional to 1,282.00, 1,923.00 and 989.93

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Solution

The fourth proportional to 1,282.00, 1,923.00 and 989.93 is: 1,484.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.00 : 1,923.00 = 989.93 : x
  2. Step 2: Convert to fraction form
    1,282.00/1,923.00 = 989.93/x
  3. Step 3: Cross multiply
    1,282.00x = 1,923.00 × 989.93
  4. Step 4: Simplify right side
    1,282.00x = 1,903,625.67
  5. Step 5: Solve for x
    x = 1,903,625.67/1,282.00
  6. Step 6: Final answer
    x = 1,484.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.